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Posted to dev@lucene.apache.org by "Kazuaki Hiraga (JIRA)" <ji...@apache.org> on 2019/04/24 09:12:00 UTC

[jira] [Commented] (LUCENE-8777) Inconsistent behavior in JapaneseTokenizer search mode

    [ https://issues.apache.org/jira/browse/LUCENE-8777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16824940#comment-16824940 ] 

Kazuaki Hiraga commented on LUCENE-8777:
----------------------------------------

I think the first one is expected behavior from the current user dictionary perspective. If we want to change the behavior, the ticket might mislead the issue. I think it should be *changing behavior of user dictionary*. 

 

> Inconsistent behavior in JapaneseTokenizer search mode
> ------------------------------------------------------
>
>                 Key: LUCENE-8777
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8777
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/analysis
>            Reporter: Tomoko Uchida
>            Priority: Minor
>
> A user reported to me about inconsistent behaviour in JapaneseTokenizer's search mode.
> Without user dictionary, JapaneseTokenizer (mode=search) outputs "long token" and all of "short (custom segmented) token"s.
> e.g.:
> 関西国際空港 => 関西 / 関西国際空港 / 国際 / 空港
> With user dictionary, JapaneseTokenizer (mode=search) outputs all short tokens but not long token.
> e.g.:
> {code}
> $ cat config/userdict.txt 
> 関西国際空港,関西 国際 空港,カンサイ コクサイ クウコウ,カスタム名詞
> {code}
> 関西国際空港 => 関西 / 国際 / 空港
>  
> This behaviour is confusing for users and would be better to be fixed. I am not sure which behaviour is correct, but in my perspective the first one (without user dictionary) is preferable.



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